Sara J. Schreiber, who oversees the toxicology lab at the Milwaukee County Medical Examiner's Office, told EMS1.com that in most cases the opioid deaths of young children are preventable.

"In the case of a toddler, especially if they're mobile, they've got access to a lot of things in the home as long as they're within their reach," Schreiber said. "So the risk is there and the danger is there inherently just by having those drugs available in the home."